1 files changed, 31 insertions, 0 deletions
diff --git a/Src/replicant/nu/win-x86/LockFreeLIFO.h b/Src/replicant/nu/win-x86/LockFreeLIFO.h
new file mode 100644
index 00000000..90ba9d33
--- /dev/null
+++ b/Src/replicant/nu/win-x86/LockFreeLIFO.h
@@ -0,0 +1,31 @@
+#pragma once
+#include "foundation/types.h"
+#include "nu/queue_node.h"
+#include "foundation/align.h"
+/* lock free stack object 
+multiple threads can push and pop without locking
+note that order is not guaranteed.  that is, if Thread 1 calls Insert before Thread 2, Thread 2's item might still make it in before.
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+	typedef NALIGN(8) struct lifo_struct_t
+	{
+		volatile queue_node_t *head;
+		uint32_t aba;
+	} lifo_t;
+
+	/* use this to allocate an object that will go into this */
+	queue_node_t *lifo_malloc(size_t bytes); 
+	void lifo_free(queue_node_t *ptr);
+
+	void lifo_init(lifo_t *lifo);
+	void lifo_push(lifo_t *lifo, queue_node_t *cl);
+	queue_node_t *lifo_pop(lifo_t *lifo);
+
+	
+
+#ifdef __cplusplus
+}
+#endif